C#########################################################
C This file is part of OpenAD released under the LGPL.   #
C The full COPYRIGHT notice can be found in the top      #
C level directory of the OpenAD distribution             #
C#########################################################
C
C$OPENAD XXX File_start [head.f]
      SUBROUTINE head(X, Y)
          use OAD_tape
          use OAD_rev

C original arguments get inserted before version
C         ! and declared here together with all local variables
C         ! generated by xaifBooster

      use OAD_active
      use w2f__types
      use oad_intrinsics
      use oad_intrinsics
      use oad_intrinsics
      IMPLICIT NONE
C
C     **** Parameters and Result ****
C
      type(active) :: X(1:1)
      type(active) :: Y(1:1)
C
C     **** Local Variables and Functions ****
C
      type(active) :: T1
      type(active) :: T2
      type(active) :: Y1
C
C     **** Top Level Pragmas ****
C
C$OPENAD INDEPENDENT(X)
C$OPENAD DEPENDENT(Y)
C
C     **** Statements ****
C


          integer iaddr
          external iaddr
C$OPENAD XXX Template ad_template.f
C$OPENAD XXX Template ad_template.f

         if (our_rev_mode%plain) then
C original function
      T1%v = (X(1)%v+X(1)%v)
      T2%v = (T1%v*2.0D00)
      Y1%v = T2%v
      Y(1)%v = Y1%v
          end if
          if (our_rev_mode%tape) then
C taping
      T1%v = (X(1)%v+X(1)%v)
      T2%v = (T1%v*2.0D00)
      Y1%v = T2%v
      Y(1)%v = Y1%v
          end if
          if (our_rev_mode%adjoint) then
C adjoint
      T1%d = T1%d+Y(1)%d*(2.0D00)
      Y(1)%d = 0.0d0
      X(1)%d = X(1)%d+T1%d
      X(1)%d = X(1)%d+T1%d
      T1%d = 0.0d0
          end if
        end subroutine head
